Statistics question and answers for December 29, 2023
- Q A statistic is said to be unbiased if O A the person computing it doesn t favor any particular outcome B it is used for only honest purposes C the...
- Q The distribution of actual weights of 8 ounce wedges of cheddar cheese produced at a dairy is Normal with mean 8 1 ounces and standard deviation 0 2 ounces A...
- Q n a large population of college educated adults the mean IQ is 112 with standard deviation 25 Suppose 300 adults from this population are randomly selected for a market research...
- Q n a large population of college educated adults the mean IQ is 112 with standard deviation 25 Suppose 300 adults from this population are randomly selected for a market research...
- Q The incomes in a certain large population of college teachers have a Normal distribution with mean 75 000 and standard deviation 10 000 Sixteen teachers are selected at random from...
- Q If X is a binomial distribution with n 20 and p 1 4 the standard deviation of X is O A 14 063 B 5 O C 3 75 O...
- Q Suppose X is a random variable with the binomial distribution with n 4 and p 1 4 The probability X is greater than or equal to 1 is A 0...
- Q The amount of milk sold each day by a grocery store varies according to the Normal distribution with mean 13 gallons and standard deviation 12 gallons On a randomly selected...
- Q A local veterinary clinic typically sees 15 of its horses presenting with West Nile virus Last month 100 horses were admitted and it was found that 20 of them had...
- Q Event A occurs with probability 0 3 and event B occurs with probability 0 4 If A and B are independent we may conclude that O A P A and...
- Q When a fair six sided die is rolled three times this is an example of O A three events that are independent B three outcomes that are disjoint C three...
- Q A college basketball player makes 5 6 of his free throws Assuming free throws are independent the probability that he makes exactly three of his next four free throws is...
- Q An event A will occur with probability 0 5 An event B will occur with probability 0 6 The probability that both A and B will occur is 0 1...
- Q An event A will occur with probability 0 5 An event B will occur with probability 0 6 The probability that both A and B will occur is 0 1...
- Q Suppose we toss a coin and roll a die Let A be the event that the number of spots showing on the die is three or less and B be...
- Q According to M Ms Web site each package of the milk chocolate candies typically contain 14 brown 13 red 14 yellow 16 green 24 blue and 20 orange M Ms...
- Q 1 A 10 point midterm test results in grades that are normally distributed with a mean of 7 5 and a standard deviation of 8 The professor plans to give...
- Q Find the appropriate p value to test the null hypothesis Ho P1 P2 using a significance level of 0 05 n 100 n 0 0021 140 x 41 x 35...
- Q Given the linear correlation coefficient r and the sample size n determine the critical values of r and use your finding to state whether or not the given r represents...
- Q Compute the test statistic used to test the null hypothesis that p P2 In a vote on the Clean Water bill 41 of the 205 Democrats voted for the bill...
- Q Construct the indicated confidence interval for the difference between population proportions P P2 Assume that the samples are independent and that they have been randomly selected In a random sample...
- Q Construct the indicated confidence interval for the difference between the two population means Assume that the two samples are independent and that they have been randomly selected Two types of...
- Q Find the value of the linear correlation coefficient r The paired data below consist of the costs of advertising in thousands of dollars and the number of products sold in...
- Q From the sample statistics find the value of p bar used to test the hypothesis that the population proportions are equal n 541 n 1927 x 160 x 689 O...
- Q Use the given data to find the equation of the regression line Round the final values to three significant digits if necessary X 1 3 5 7 9 y v...
- Q Find the best predicted value of y corresponding to the given value of x Ten pairs of data yield r 0 003 the regression equation 2 3x and y bar...
- Q OT y x 1 y x 4 solution x y
- Q Sy 1 x 2 TTTTTTT solution x y
- Q X H 3x 3 TO solution x H y
- Q I Solve and graph y 8x 10 9 8 7 100 la 937DDTANE B 6 5 4 3 2 10 14 51 789 7 8 10 2 3 4 5...
- Q 8 9 10 2 Where is the y intercept f x 6 4 3 2 1 1 2 03 4 LO T
- Q Assembly Product design Electricity Set up Total overhead allocated 4 Job 42 Assembly Product design Electricity set up Total our head allocated DLH EM MH Set ups DLM EH MH...
- Q SF S St
- Q 2 Sunn Company manufactures a single product that sells for 100 per unit and whose variable costs are 76 per unit The company s annual fixed costs are 338 400...
- Q Find the value of Za ZO 44 Round to two decimal places as nee
- Q Determine the total area under the standard normal curve in parts a through c below a Find the area under the normal curve to the left of z 2 plus...
- Q Suppose the lengths of human pregnancies are normally distributed with 266 days and a 16 days Complete parts a and b below BOCCH a The figure to the right represents...
- Q The random number generator on calculators randomly generates a number between 0 and 1 The random variable X the number generated follows a uniform probability distribution a Identify the graph...
- Q A study was conducted that resulted in the following relative frequency histogram Determine whether or not the histogram indicates that a normal0 4 distribution could be used as a model...
- Q A simple random sample of 10 pages from a dictionary is obtained The numbers of words defined on those pages are found with the results n 10 x 55 4...
- Q A random sample of 834 births included 433 boys Use a 0 01 significance level to test the claim that 51 4 of newborn babies are boys Do the results...
- Q Use the sample data and confidence level given below to complete parts a through d A drug is used to help prevent blood clots in certain patients In clinical trials...
- Q You randomly select one card from a 52 card deck Find the probability of selecting black ten or a black queen 13 26 12 13 01 12
- Q A genetic experiment with peas resulted in one sample of offspring that consisted of 449 green peas and 160 yellow peas a Construct a 90 confidence interval to estimate of...
- Q Independents Suppose that two group members are randomly selected in succession to attend a political convention Find the probability of selecting an Independent and then a Democrat Probability of Compound...
- Q Use the sample data and confidence level given below to complete parts a through d A drug is used to help prevent blood clots in certain patients In clinical trials...
- Q Solve the problem For large numbers of degrees of freedom the critical x values can be 2 z 2k 1 where k is the number of degrees of freedom and...
- Q Use the Hypothesis Testing Identify Null and Alternative Hypotheses flow chart interactive to answer the following question Which of the following is not a valid expression for an alternative hypothesis...
- Q A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects After treatment with the drug 14 subjects had a mean wake...
- Q Use the given information to find the p value Also use a 0 05 significance level and state the conclusion about the null hypothesis reject the null hypothesis or fail...
- Q The director of research and development is testing a new medicine She wants to know if there is evidence at the 0 05 level that the medicine relieves pain in...
- Q A simple random sample of 10 pages from a dictionary is obtained The numbers of words defined on those pages are found with the results n 10 x 55 4...
- Q A data set about speed dating includes like ratings of male dates made by the female dates The summary statistics are n 190 x 5 81 s 2 27 Use...
- Q A formal hypothesis test is to be conducted using the claim that the mean body temperature is equal to 98 6 F What is the null hypothesis and how is...
- Q In a study of cell phone usage and brain hemispheric dominance an Internet survey was e mailed to 6988 subjects randomly selected from an online group involved with ears There...
- Q Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors Use the table below to find the minimum sample...
- Q A data set includes 106 body temperatures of healthy adult humans having a mean of 98 7 F and a standard deviation of 0 66 F Construct a 99 confidence...
- Q ten A group of data items and their mean are given Find a the deviation from the mean for each of the data items and b the sum of the...
- Q 2 Cost B Et Cost 3 c Co 1 Total B C Total 2 Cost Er Cost Inver 3 Send a mes 10 Part 1 of 2 3 points Required...
- Q Twelve different video games showing alcohol use were observed The duration times of alcohol use were recorded with the times seconds listed below What requirements must be satisfied to test...
- Q Part 1 of 2 3 points Required information Required 1 Compute the a cost of products transferred from weaving to sewing b cost of products transferred from sewing to finished...
- Q Students estimated the length of one minute without reference to a watch or clock and the times seconds are listed below Assume that a simple random sample has been selected...
- Q Which of the following is not a characteristic of the t test Choose the correct answer below OA The t test is robust against a departure from normality OB The...
- Q In a recent court case it was found that during a period of 11 years 858 people were selected for grand jury duty and 35 of them were from the...
- Q Which of the following is not a requirement for testing a claim about a population with a not known Choose the correct answer below O A The value of the...
- Q Trials in an experiment with a polygraph include 99 results that include 22 cases of wrong results and 77 cases of correct results Use a 0 01 significance level to...
- Q Probability of Compound Events Independent Events Dependent Events P A and B P A P B P A and B P A Mutually Exclusive Events Not Mutually Exclusive Events P...
- Q Use the results from a survey of a simple random sample of 1281 adults Among the 1281 respondents 81 rated themselves as above average 3 drivers We want to test...
- Q Assume a significance level of 0 05 and use the givell complete parts a and b below Original claim More than 46 of adults would erase all of their personal...
- Q In a study of 784 randomly selected medical malpra found that 495 of them were dropped or dismissed Use a 0 05 significance level to test the claim that most...
- Q male teaching assistants and 13 female teaching assistants If a person is selected at random from the group find the probability that the selected person is a teaching assistant or...
- Q The overnight shipping business has skyrocketed in the last few years A study was conducted to study the customer satisfaction levels for one overnight shipping business In addition to the...
- Q The following table displays a distribution for a group of retired people by career and age at retirement Suppose one of these people is selected at random Find the probability...
- Q A single six sided die is rolled twice The 36 equally likely outcomes are shown below Find the probability of getting two numbers whose sum is 5 Second Roll First...
- Q In 1999 the stock market took big swings up asked how often they tracked their portfolio The table shows the investor responses What is the probability that an adult investor...
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